Consider two concentric spherical surfaces, S1 with radius a and S2 with radius 2a, both centered at the origin….

Q.Consider two concentric spherical surfaces, S1 with radius a and S2 with radius 2a, both centered at the origin. There is a charge +q at the origin and there are no other charges. Compare the flux φ1  through S1 with the flux φ2 through S2.

(a) φ1 = 4φ2

(b) φ1 = 2φ2

(c) φ1 = φ2

(d) φ1 = φ2 /2

Ans: (c)

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